The pre-releases always seem better than the actual release.
Also I got the beta build 7000 (64bit) before they released it for the public. Least it runs stable enough and fast enough on VmWare Fusion on my macbook, haven't attempted to boot from it directly (which would be the real indicator of stability once you give it total access to your hardware).
If I ever get bored or bold enough, I may nuke the Vista x64 installation and put 7x64 onto the other partition of this macbook... assuming it'll load vista drivers. ( been using XP in Vmware most of the time, since I typically only need to boot windows to see how something looks in IE7/8)